Lanai , Hawaii
Concierge.com's insider take:
Hike along the high ridge to Lanaihale summit, and you'll be rewarded. At 3,370 feet, it's the only place in the state where you can see six Hawaiian islands at once: Lanai, Maui, Kahoolawe, Molokai, Oahu, and the Big Island. You'll wend your way through dense rain forests full of eucalyptus and pine, that open up to vast panoramas of canyons and ocean. Mountain bikers and four-wheel-drive vehicles can also access this dirt trail, named after New Zealand naturalist George Munro, who planted the ubiquitous Cook Island pines to create a watershed for Lanai.